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Finding the Fourth Proportional to 61.39, 92.06 and 30.86

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Solution

The fourth proportional to 61.39, 92.06 and 30.86 is: 46.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.39 : 92.06 = 30.86 : x
  2. Step 2: Convert to fraction form
    61.39/92.06 = 30.86/x
  3. Step 3: Cross multiply
    61.39x = 92.06 × 30.86
  4. Step 4: Simplify right side
    61.39x = 2,840.82
  5. Step 5: Solve for x
    x = 2,840.82/61.39
  6. Step 6: Final answer
    x = 46.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.